18
Baseline Calibration
All parameters have their own baseline calibration,
found in the parameters menu. Normally this
function is not used, and the default is therefore a
disabled status. But if you for any reason find some
deviations, and are 100% sure of the true value, you
can compensate for this by using the
Baseline
Calibration
. If you use this function , enter the
reference value in ”
Ref value
” and the machine
value in ”
Mastertronic value
”. Of course both samples
must have been taken at the exact same time, and on same location from the tank,
and the reference value should be proved to be accurate (see this section)
Auto Check Mode
If this mode is enabled, Mastertronic will redo the
measurement
once
if it´s outside the settled reference
values, and settle the second measurement. This is a safety
feature to validate that a value is really correct before it
leads to any actions.
Nitrite Correction Mode
(Coming soon)
Nitrate tests work in that way it´s converting a portion of the
nitrate (NO
3
) in the sample to nitrite (NO
2
), and then actually
measures nitrite. So theoretically if you have a significant amount of nitrite in the
tank water, that could lead to a slightly false high measurement of nitrate.
In the
majority of situations the nitrite is of very low concentration (< 0.02 mg/l), so
this is negligible
and thus does
not
have this effect on the final nitrate value.
But in some
special situations
like an immature tank with slow nitrification process
(nitrite values >0.02 mg/l) you have the option to set the machine in Nitrite C
orrection
Mode
, and then a nitrate test will be proceeded automatically by a nitrit test and then
Mastertronic do the compensation math, and always give you the true nitrate value
even if there has been some nitrite in the water. Mastertronic uses same reagent/s
for NO
2
, as for NO
3
measurement, so you
don´t have to assign any new reagents.
Ex: You are in the parameters menu for Nitrate. Action Mode ON, and
Automatic Mode ON. You assign Dosetronic channel 1, Minus Direction
Mode (default) , and Dosetronic channel 2, Plus Direction Mode. You
assign socket 1, Plus Direction Mode. In channel 1 you dose Nitrate. In
channel 2 you dose organic carbon. The socket 1 is connected to a
biopellets reactor.
Now Mastertronic will do a nitrate measure and we assume its above
your ref value. This will now happen: In channel 1 in Dosetronic the
nitrate schedule will be overall decreased by 10%, as a single action. In
channel 2 in Dosetronic the organic carbon schedule will be increased by
10%, as a single action. The socket 1 in powertronic will open (or keep its
open status). Action Mode will after that go OFF, and after 4 days
automatically goes ON again.
